FLOOD11712

• Designation Number: 354.12
• County: Boulder
• Community: Longmont
• Basin: South Platte
• Title: FIS - Longmont
• Date: 1/1/1977
• Prepared For: Boulder County
• Prepared By: FEMA
• Floodplain - Doc Type: Historic FEMA Regulatory Floodplain Information

and 3.0 feet and the product of
the dept~ (in =eet) a~d velocity
(in feet per second) is less
than 15. No Flood Hazard Fac-
tors determined.

Zones

... ,
!"1...L I

- ~
Aj,

A4,

and

Special flood hazard areas inun-
dated by the lOO-year flood, de-
termined by detailed nethods;
base flood elevations shown,
and zones subdivided according
to Flood Hazard Factors.

AS:

Zcr:e .:j:

Areas between the special flood
hazard area and the limits of
the 500-year flood, including
areas of the SOO-year flood
plain that are protected from
the IOO-year flood by dike, levee
or other water control structure
and areas subject to certain types
of IOO-year shallow flooding where
depths are less than 1.0 foot.
Zone B is not subdivided.

Zor:e C:

Areas not subject to flooding
by the 500-year flood, includ-
ing areas that are protected
from SOG-year floods by dike,
levee, or other water control
str~cture; not subdivided.

Table 2, "Flood Insl:rance Zone Data", summarizes the
f~ooc elevatioL dif=erences, Flooe Hazard Factors, flood
ir.sarance zo~es, aLe base flooa elevations for each flood-
ing source stueied in detail in the co~~unity.

S.4 ?laod Insa~a~ce Rate Map Description

~he Flood Insurance Rate ~ap for the City of Longmont
is, for insurance purposes, t~e principal result of the
Flood Insurance S~udy. This map (publis~ed separately)
co~tains the official delineation of flood insurance zones
a~c ~ase flood elevation lir:es. Base flood elevation lines
s~ow the locations of the expected whole-foot water-sur-
face eleva~ions of the base (lOO-year) flood. This map
is developed in accordance with t~e latest ~lood insur-
ance map prepara~ion g~idelines p~blished by the Federal
Emergency Management Agency.

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